Which endangered animal is the source of the world's finest, lightest, warmest and most expensive wool - the shahtoosh ?
- Nilgai
- Cheetal
- Kashmiri goat
- Chiru
The Correct Option is D
Solution and Explanation
Top Questions on Biodiversity and Conservation
- India has only 2.4% of the world's land area but its share of the global species diversity is:
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
- Student to attempt either option-(A) or (B): (A)
- [(i)] How does alien species invasion cause a decline in biodiversity? Explain.
How have the following contributed to biodiversity loss?- I. Nile Perch
- II. Lantana and Eichhornia
- III. Clarias gariepinus
- [(ii)] Why have certain regions been declared as biodiversity hotspots by environmentalists of the world? Name any two such regions in India.
(B)- [(i)] Write an equation for Verhulst-Pearl Logistic Growth Curve where:
N = Population density at time ‘t’
r = Intrinsic rate of natural increase - [(ii)] Draw a graph for a population whose population density has reached carrying capacity.
- [(iii)] Draw a growth curve where resources are non-limiting to growth of population.
- [(iv)] Which growth curve is considered more realistic and why? Explain.
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
- [(i)] How does alien species invasion cause a decline in biodiversity? Explain.
- India has only 2.4% of the world's land area but its share of the global species diversity is:
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
Answer the following questions:
- Explain how the process of RNA interference technology is used effectively to prevent infestation of the roots of tobacco plant by the nematode Meloidogyne incognita.
OR - Explain how more than a billion copies of a fragment of DNA are formed using the technique of PCR.
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
- Explain how the process of RNA interference technology is used effectively to prevent infestation of the roots of tobacco plant by the nematode Meloidogyne incognita.
- Answer the following questions:
-
- [(i)] Describe the Species-Area relationship as observed by Alexander von Humboldt, for a wide variety of taxa in nature.
- [(ii)] Draw the graph showing Species-Area relationship for \( S = CA^Z \). What is the significance of ‘\( Z \)’ in Species-Area relationship?
-
- [(i)] Describe the logistic population growth curve with the help of a suitable graphical representation.
- [(ii)] Write the equation of Verhulst-Pearl logistic growth curve and explain what ‘\( K \)’ and ‘\( r \)’ suggest in the given equation.
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
-
Questions Asked in NEET exam
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
- NEET (UG) - 2025
- Electromagnetic Induction and Inductance
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
- Consider the diameter of a spherical object being measured with the help of a Vernier Callipers. Suppose its 10 Vernier Scale Divisions (V.S.D.) are equal to its 9 Main Scale Divisions (M.S.D.). The least count in the M.S. is 0.1 cm and the zero of V.S. is at -0.1 cm when the jaws of Vernier callipers are closed. If the main scale reading for the diameter is \(M = 5\) cm and the number of coinciding vernier division is 8, the measured diameter after zero error correction, is:
- NEET (UG) - 2025
- Measurement of length
- A photon and an electron (mass \(m\)) have the same energy \(E\). The ratio \( \frac{\lambda_{\text{photon}}}{\lambda_{\text{electron}}} \) of their de Broglie wavelengths is: (\(c\) is the speed of light)
- NEET (UG) - 2025
- Dual nature of radiation and matter
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
Concepts Used:
Biodiversity and Conservation
The term ‘biodiversity’ is derived from the two words- ‘bios' which means life and ‘diversity’ i.e, differentiation or variation. Edward Wilson, the sociobiologist was the first to popularise the term ‘biodiversity’ in the year 1992. The term implies the occurrence of various plants and animals along with their variants such as biotypes, ecotypes and genes on earth. In our biosphere, the immense diversity or heterogeneity remains not only at the species level but also, at every level of biological organization that ranges from macromolecules in the cells to biomes.
Biodiversity and Conservation is a topic covered under the fifteenth chapter and Unit 5 of NCERT class 12 biology.